Cleaning brush



FIG. 1 is a top view of the cleaning brush showing my design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a side view thereof;

FIG. 6 is an opposite side view thereof; and,

FIG. 7 is an upper perspective view thereof. 

The ornamental design for a cleaning brush, as shown and described. 